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A. cho nước cứng tác dụng với dung dịch muối ăn bão hòa. cho nước cứng tác dụng với dung dịch HCl dư sau đó đun sôi kĩ dung dịch để đuổi khí. Sau khi phản ứng kết thúc thu được chất rắn [r]
HÓA HỌC 12-HK2[2019-2020]
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